Insulating glass
Insulating glass (also referred to as insulated glass) refers to two or more lites of glass sealed around the edges with an air space between, to form a single unit.
Commonly referred to as an “IG unit,” insulating glass is the most effective way to reduce air-to-air heat transfer through the glazing. When used in conjunction with low-E and / or reflective glass coatings, IG units become an effective means to conserve energy and comply with building codes.
The most common architectural insulating glass unit configuration is 1/4" glass / 1/2" air space / 1/4" glass.
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